Common Questions Is the S8401-007 a direct replacement for the 8401-007

Does this unit include the mounting gasket

Integrated Heater: Prevents internal moisture buildup

making it the reliable choice for technicians who prioritize system uptime and efficiency

this unit delivers 35 in-lb of torque and offers versatile control options

Aprilaire 4655 Humidifier Control 322838-752 Common Questions Is the S8401-007The Aprilaire 4655 Humidifier Control is a reliable, manual humidistat designed to provide precise low voltage 24V management for your central heating and cooling system. This essential HVAC humidity sensor utilizes a highly sensitive mechanical nylon ribbon filament that expands and contracts based on moisture levels, ensuring your whole house humidifier operates only when necessary. By manually adjusting the relative humidity (RH) setpointtypically